Synthesis and optical properties of yellow emitting garnet phosphors for pcLEDs

被引：48

作者：

Katelnikovas, A. ^{[1
,2
]}

Sakirzanovas, S. ^{[3
]}

Dutczak, D. ^{[1
]}

Plewa, J. ^{[1
]}

Enseling, D. ^{[1
]}

Winkler, H. ^{[4
]}

Kareiva, A. ^{[2
]}

Juestel, T. ^{[1
]}

机构：

[1] Univ Appl Sci Munster, Dept Chem Engn, D-48565 Steinfurt, Germany

[2] Vilnius State Univ, Dept Gen & Inorgan Chem, LT-03225 Vilnius, Lithuania

[3] Vilnius State Univ, Dept Phys Chem, LT-03225 Vilnius, Lithuania

[4] Merck KGaA, D-64291 Darmstadt, Germany

来源：

JOURNAL OF LUMINESCENCE | 2013年 / 136卷

关键词：

Photoluminescence spectroscopy; Quantum efficiency; Thermal quenching; CE3+ LUMINESCENCE; PHOTOLUMINESCENCE;

D O I：

10.1016/j.jlumin.2012.11.012

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A series of CaY2Al4SiO12:Ce3+ garnet-type luminescent materials was prepared by a sol-gel combustion technique. All samples were characterized by powder X-ray diffraction (XRD), thermal quenching (TQ), fluorescence lifetime, and photoluminescence (PL) measurements. Moreover, luminous efficacies (LE), CIE 1931 color points, and quantum efficiencies (QE) were calculated and discussed. XRD patterns indicated that sintering at 1450 degrees C yielded single phase garnets. Phosphors showed a broad band emission in the range 460-750 nm. The emission band maximum is blue-shifted in comparison to Y3Al5O12:Ce3+ and shifts from 542 to 560 nm by increasing the Ce3+ concentration. The highest achieved QE was 86% for the sample doped with 0.25% of Ce3+. Higher Ce3+ doping levels resulted in concentration quenching. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：17 / 25

页数：9

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